A supersonic flow over a rectangular cavity is known to oscillate at certain predominant frequencies. The present study focuses on the effect of the cavity length-to-depth (L/D) ratio on the frequency for a free-stream Mach number of 1.7. The pressure oscillations are measured by changing the L/D ratio from 0.5 to 3.0, and the power spectral density is calculated from the temporal pressure signals for each L/D ratio. The results demonstrate that the spectral peaks for an L/D ratio of less than ~1 and greater than ~2 are accounted for by the feedback mechanisms of the transverse and longitudinal oscillations, respectively. The results also demonstrate that the spectral peaks in the transition (1 <~ L/D <~ 2) are accounted for by either of the two feedback mechanisms of transverse and longitudinal oscillations; that is, the flows under the transition regime oscillate both transversely and longitudinally.


    Access

    Download


    Export, share and cite



    Title :

    Frequencies of Transverse and Longitudinal Oscillations in Supersonic Cavity Flows


    Contributors:


    Publication date :

    2015




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown




    Fuel-Air Mixing by Cavity-Induced Acoustic Oscillations in Confined Supersonic Flows

    Chandra, B. / Bharathraj, R / Chakravarthy, Sathyanarayanan | AIAA | 2003



    Mode Behavior in Supersonic Cavity Flows

    Thangamani, Varun | AIAA | 2019


    Supersonic Cavity Flows and Their Control

    Ning Zhuang / Farrukh Alvi / Mehmet Alkislar et al. | AIAA | 2006